1223300220991 has 2 divisors, whose sum is σ = 1223300220992. Its totient is φ = 1223300220990.

The previous prime is 1223300220973. The next prime is 1223300221001. The reversal of 1223300220991 is 1990220033221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1223300220991 - 2⁹ = 1223300220479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223300220971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611650110495 + 611650110496.

It is an arithmetic number, because the mean of its divisors is an integer number (611650110496).

Almost surely, 2^{1223300220991} is an apocalyptic number.

1223300220991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223300220991 is an equidigital number, since it uses as much as digits as its factorization.

1223300220991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 1223300220991 in words is "one trillion, two hundred twenty-three billion, three hundred million, two hundred twenty thousand, nine hundred ninety-one".